煤矿安全2017，Vol.48Issue(2)：145-148,4.DOI:10.13347/j.cnki.mkaq.2017.02.039
不同注氮压力置驱煤层甲烷试验中的机理分析
Mechanism Analysis on Experiment of Injecting Nitrogen to Displace Coal Seam Methane Under Different Pressure
摘要
Abstract
Through the physical simulation experiments of gas injection in coal seam,the mechanism of injecting nitrogen to displace coal seam methane under pressure of 0.6 MPa,1.0 MPa,1.4 MPa is analyzed.The analysis of experiment results show that at the early stage of gas injection experiment,the injected nitrogen is adsorbed by coal and the methane in coal is replaced.When the injected nitrogen breaks through the box,the displacement effect of nitrogen appears.The macroscopic phenomena of the experiment show the displacement and replacement effect of injected nitrogen.But starting from the methane desorption of micro pore,dilution and diffusion effect could be one of the mechanisms of nitrogen injection to displace coal seam methane.Through the analysis of injecting nitrogen to displace coal seam methane,the mechanism of injecting weak adsorption gas to displace coal seam methane is concluded.关键词
煤层注氮气/机理分析/置换解吸/驱替/稀释扩散Key words
nitrogen injection of coal seam/mechanism analysis/replacement desorption/displacement/dilution and diffusion分类
矿业与冶金引用本文复制引用
杨宏民,冯朝阳,陈立伟..不同注氮压力置驱煤层甲烷试验中的机理分析[J].煤矿安全,2017,48(2):145-148,4.基金项目
国家自然科学基金资助项目(51174081) （51174081）
河南理工大学博士基金资助项目(B2012-89) （B2012-89）
